staging: lustre: hsm: make HSM modification requests replayable

There are several HSM requests which modify data on server and
reply on Lustre recovery, e.g. they should replay changes in
case of recovery.

Patch allows such requests to be replayed in recovery time and
they are issued from client using mdc_rpc_lock to serialize them
and avoid concurrent last_rcvd update on server.

Signed-off-by: Mikhail Pershin <mike.pershin@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5939
Reviewed-on: http://review.whamcloud.com/13684
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Faccini Bruno <bruno.faccini@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/mdc/mdc_request.c b/drivers/staging/lustre/lustre/mdc/mdc_request.c
index 7b9fb9026bdfce34bc5ec39cc32ad7dbf606eeca..1d1eaa5238ad69cb499e2ed7c7046b5741906ada 100644 (file)
--- a/drivers/staging/lustre/lustre/mdc/mdc_request.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_request.c
@@ -1505,7 +1505,9 @@ static int mdc_ioc_hsm_progress(struct obd_export *exp,
 
        ptlrpc_request_set_replen(req);
 
-       rc = mdc_queue_wait(req);
+       mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
+       rc = ptlrpc_queue_wait(req);
+       mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 out:
        ptlrpc_req_finished(req);
        return rc;
@@ -1683,7 +1685,9 @@ static int mdc_ioc_hsm_state_set(struct obd_export *exp,
 
        ptlrpc_request_set_replen(req);
 
-       rc = mdc_queue_wait(req);
+       mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
+       rc = ptlrpc_queue_wait(req);
+       mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 out:
        ptlrpc_req_finished(req);
        return rc;
@@ -1746,7 +1750,9 @@ static int mdc_ioc_hsm_request(struct obd_export *exp,
 
        ptlrpc_request_set_replen(req);
 
-       rc = mdc_queue_wait(req);
+       mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
+       rc = ptlrpc_queue_wait(req);
+       mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 out:
        ptlrpc_req_finished(req);
        return rc;